contraction of muscle definition
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Muscle contraction Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not mean muscle shortening because muscle tension can be produced without changes in muscle length such as holding a heavy book or a dumbbell at the same position.he termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. Muscle contractions can be described based on two variables: length and tension.
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What is the contraction phase (of muscles) and what events are occuring? Best Answer: A muscles contraction (also known as a muscle twitch or simply twitch) occurs when a muscle fibre generates tension through the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten or remain the same. Though the term 'contraction' implies a shortening or reduction, when used as a scientific term referring to the muscular system contraction refers to the generation of tension by muscle fibers with the help of motor neurons. Contraction is will happen once a muscle is stimulated by a threshold stimulus. Muscle Contraction. 1. The distal end of a motor neuron releases acetylcholine. 2. Acetylcholine diffuses across the gap at the neuromuscular junction. 3.
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muscle (mŭs′əl) A body tissue composed of elongated cells (called muscle fibers) that contract to produce movement. In vertebrate animals, voluntary movement is produced by the action of muscles on bone. Movement of the muscles of the heart and other organs is involuntary and controlled by the autonomic nervous system.
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contraction isotonic contraction muscle contraction without appreciable change in the force of contraction; the distance between the muscle's origin and insertion becomes lessened. lengthening contraction a muscle contraction in which the ends of the muscle move farther apart, as when the muscle is forcibly flexed.ourglass contraction contraction of an organ, as the stomach or uterus, at or near the middle. isometric contraction muscle contraction without appreciable shortening or change in distance between its origin and insertion. Isotonic (A) and isometric (B) contraction.
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eccentric contraction eccentric contraction, a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion.The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch.Compare concentric contraction. type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch. Compare concentric contraction.
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eccentric contraction lengthening contraction eccentric contraction. postural contraction the state of muscular tension and contraction that just suffices to maintain the posture of the body. segmental c's muscular contractions of the small intestine that serve to mix and transport chyme. shortening contraction concentric contraction. type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch. Compare concentric contraction.
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contraction noun. The definition of contraction is the lengthening or shortening of a muscle fiber or a word formed by combining the sounds of two longer words. 1  An example of a contraction is the action of the uterus during the birth process. 2  An example of a contraction is the word doesn't from does not.ontraction-Computer Definition. The shortening of a word or phrase by omitting letters or syllables. In the English language, a contraction generally, but not always, marks the omitted letters or syllables with an apostrophe or a period.
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muscle 1. A tissue composed of fibers capable of contracting to effect bodily movement. 2. A contractile organ consisting of a special bundle of muscle tissue, which moves a particular bone, part, or substance of the body: the heart muscle; the muscles of the arm.3. Muscular strength: enough muscle to be a high jumper.ntagonistic muscle - (physiology) a muscle that opposes the action of another; the biceps and triceps are antagonistic muscles. eye muscle, ocular muscle-one of the small muscles of the eye that serve to rotate the eyeball.
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muscle mus•cle. 1. a tissue composed of elongated cells, the contraction of which produces movement in the body. 2. a specific bundle of such tissue. 3. muscular strength; brawn. 4. power or force, esp. of a coercive nature: They put muscle into their policy and sent the marines.
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- Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not mean muscle shortening because muscle tension can be produced without changes in muscle length such as holding a heavy book or a dumbbell at the same position.
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Muscle contraction The contraction produced can be described as a twitch, summation, or tetanus, depending on the frequency of action potentials. In skeletal muscles, muscle tension is at its greatest when the muscle is stretched to an intermediate length as described by the length-tension relationship. Smooth and cardiac muscle contractions are myogenic and can be modulated by the autonomic nervous system.
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- Muscle. Definition. noun, plural: muscles'. An organ made up of muscle tissues, or the tissue itself, enabling contraction or tension in an animal body to effect movement or locomotion. Supplement. Muscles are a specialized body part that produces movement or locomotion in animals.
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Muscle contraction The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. Muscle contractions can be described based on two variables: length and tension.A muscle contraction is described as isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same.Furthermore, if the muscle length shortens, the contraction is concentric.he termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. Muscle contractions can be described based on two variables: length and tension.
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Contracture A muscle contracture is a permanent shortening of a muscle or joint. It is usually in response to prolonged hypertonic spasticity in a concentrated muscle area, such as is seen in the tightest muscles of people with conditions like spastic cerebral palsy.
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Muscle noun, plural: muscles'. An organ made up of muscle tissues, or the tissue itself, enabling contraction or tension in an animal body to effect movement or locomotion. Supplement. Muscles are a specialized body part that produces movement or locomotion in animals. The muscle is comprised (largely) of muscle tissues.
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PHYSIOLOGY relaxation - (physiology) the gradual lengthening of inactive muscle or muscle fibers. stimulation - (physiology) the effect of a stimulus (on nerves or organs etc.) summation - (physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce
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- Contraction and relaxation of a skeletal muscle or group of muscles in which the force generated by the muscle is equal to the resistance. There is no change in muscle length, and no movement results. See: illustration Synonym: muscle-setting exercise; static exercise
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contraction noun. The definition of contraction is the lengthening or shortening of a muscle fiber or a word formed by combining the sounds of two longer words. 1  An example of a contraction is the action of the uterus during the birth process. 2  An example of a contraction is the word doesn't from does not.ontraction-Computer Definition. The shortening of a word or phrase by omitting letters or syllables. In the English language, a contraction generally, but not always, marks the omitted letters or syllables with an apostrophe or a period. Telco, for example, is a contraction of telephone company.
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Muscle Contraction Types â Part 1 Concentric contractions: A concentric contraction is a type of muscle contraction where the length of the muscles shorten while undergoing tension. For example, when you pick up a curl bar and perform a biceps curl, the length of your biceps muscles shorten.Your hands start down by your sides, and ends with your hands up by your shoulders.his is another example of a voluntary eccentric contraction. b) Involuntary eccentric contractions: Involuntary eccentric contractions occur when the weight or resistance you are attempting to move or lift is too heavy or strong for the muscle to accommodate.
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Muscle contraction The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. Muscle contractions can be described based on two variables: length and tension.A muscle contraction is described as isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same.he termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. Muscle contractions can be described based on two variables: length and tension.
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contraction shortening contraction a muscle contraction in which the ends of the muscle move closer together, as when a flexed limb is extended. tetanic contraction sustained muscular contraction without intervals of relaxation.tonic contraction tetanic c. twitch contraction twitch.ourglass contraction contraction of an organ, as the stomach or uterus, at or near the middle. isometric contraction muscle contraction without appreciable shortening or change in distance between its origin and insertion. Isotonic (A) and isometric (B) contraction.
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Definitions &Translations Wiktionary (0.00 / 0 votes) Rate this definition: muscle (Noun). A contractile form of tissue which animals use to effect movement. Muscle consists largely of actin and myosin filaments.muscle (Noun). An organ composed of muscle tissue. The muscles in his legs strained under the load. muscle (Noun). Strength.iktionary (0.00 / 0 votes) Rate this definition: muscle (Noun). A contractile form of tissue which animals use to effect movement. Muscle consists largely of actin and myosin filaments.
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Muscle contraction In vertebrates, skeletal muscle contractions are neurogenic as they require synaptic input from motor neurons to produce muscle contractions. A single motor neuron is able to innervate multiple muscle fibers, thereby causing the fibers to contract at the same time. muscle contraction is described as isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same. Furthermore, if the muscle length shortens, the contraction is concentric.
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- Muscle contraction is the activation of tension-generating sites within muscle fibers.In physiology, muscle contraction does not mean muscle shortening because muscle tension can be produced without changes in muscle length such as holding a heavy book or a dumbbell at the same position.n contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same. Furthermore, if the muscle length shortens, the contraction is concentric.
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Muscle tone Muscle tone. Definition. noun. (1) The muscle in a steady partially contracted state caused by the successive flow of nerve impulses. (2) The amount of tension or resistance to movement in a muscle. Supplement. Muscle tone or tonus helps in maintaining body posture.
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eccentric contraction eccentric contraction. controlled relaxation of a contracted muscle, movement occurring as a result of the lengthening of the muscle(s). eccentric contraction. a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch. Compare concentric contraction. eccentric contraction a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch.